defulmere

Bootstrap a rails project without rails installed

Set GEM_HOME to an ephemeral directory then use gem exec to run rails:

export GEM_HOME=$( mktemp -d )
gem exec rails new myproject
cd myproject
bundle config set deployment true
bundle install

defulmere

#!/bin/bash

mkdir -p ~/opt/{tmp,src}
export TMPDIR=~/opt/tmp
export CPPFLAGS="-I$HOME/opt/include $CPPFLAGS"
export LDFLAGS="-L$HOME/opt/lib $LDFLAGS"
export LD_LIBRARY_PATH=$HOME/opt/lib
export PATH=$HOME/opt/bin:$PATH

echo 'export PATH=$HOME/opt/bin:$PATH' >> ~/.bashrc

defulmere

Adapted from the official upgrade notes and starting with a v3.5.3 non-Docker source install:

# back everything up first, then as mastodon user
cd ~/live
git fetch && git checkout v4.0.2
# do next step only if you're stuck on ruby 3.0.3
sed -e -i 's/3.0.4/3.0.3/' .ruby-version
bundle install

defulmere

<?php
/*
Plugin Name: Add Security Headers
Description: adds security headers to wordpress
*/

function add_security_headers() {
    if ( $_SERVER['HTTP_X_FORWARDED_SSL'] == 'on' ) {
        header('Strict-Transport-Security: max-age=31536000');
        header('X-XSS-Protection: 1; mode=block');

defulmere

1. Create a new MariaDB database and user at https://my.opalstack.com/mariadb/ and make a note of the database name, database user name, and database user password.

2. Create a new shell user at https://my.opalstack.com/apps/.

3. SSH to the new shell user and run the following commands:

   cd ~
   # install composer
   mkdir -p ~/bin
   wget -O composer-setup.php https://getcomposer.org/installer
   php74 composer-setup.php --install-dir=$HOME/bin --filename=composer
   

defulmere

RabbitMQ on Opalstack

1. Some preparatory steps:

    mkdir -p ~/tmp ~/src ~/lib
    export TMPDIR=~/tmp
    export PATH=$HOME/bin:$PATH
   

2. Create a 'nginx proxy port' application named 'epmd' in the dashboard to reserve a port for epmd. (11111 in the examples below)

defulmere

np=$( nproc ); atopsar -p | grep ":[0-9]\{2\}\s\+[0-9]" | awk '{printf("\n%s %6.2f ",$1, $5); for (i = 0; i<$5; i++) {if (i<'$np'*.7) {printf "\033[32m"} else if (i<'$np') {printf "\033[33m"} else {printf "\033[31m"}; printf("█")}; printf "\033[0m"}'; echo ""

defulmere

HOWTO install Nextcloud on Opalstack

1. In your Opalstack dashboard create a new "Nginx Proxy Port" application and attach it to a site with Let's Encrypt enabled on the site. Make a note of the app's name and port assignment, and the site domain.

2. In your Opalstack dashboard create a new MariaDB database and user. Make a note of the DB name, DB user name, and password.

3. SSH to your app's shell user and run the following commands:

   cd ~/apps/appname
   git clone -b opalstack https://github.com/rsanden/userspace-fpm-installer.git
   cd userspace-fpm-installer
   

defulmere

<?php

// Use in the "Post-Receive URLs" section of your GitHub repo.

if ( $_POST['payload'] ) {
  shell_exec( 'cd /srv/www/git-repo/ && git reset --hard HEAD && git pull' );
}

?>hi

defulmere

import requests
from ipaddress import *

subnets = requests.get('https://www.cloudflare.com/ips-v4').content.split()

for s in subnets:
    subnet = IPv4Network(s.decode())
    for h in subnet.hosts():
        print(h)